Why does the منظومة الطيبة not suffice for the Shāṭibiyyah and the Durrah in the study of Qirāʼāt, despite the fact that it encompasses what is in them and adds to them, and is memorizing the الطيبة sufficient for knowing the Ten Qirāʼāt?

Students usually start with the Shatibiyyah and then the Durrah, as they encompass the minor ten (readings). As for the Tayyibah, it includes additions and other facets from the An-Nashr. A student cannot master and differentiate between the two paths (the minor ten and the Tayyibah's additions) except by reading the Shatibiyyah and the Durrah. Nevertheless, there is no impediment to starting directly with the Tayyibah to shorten the journey, though starting with what was mentioned first is more conducive to mastery.